I have had my Rain Internet router since Tuesday and it is still not working

I have had my Rain Internet router since Tuesday and it is still not working. I was told it would be escalated and I would be called by Rain. Yet STILL No call from rain. I am so frustrated and disgusted by the service, or should I say NON SERVICE from Rain. So here my router stands, plugged in and not working. WHAT CAN I DO TO GET MY WI-FI WORKING RAIN INTERNET SERVICE PROVIDER?????